Denon AH-C100BU Urban Raver In-Ear Headphone with In-Line Mic and Controls (Blue) 11.5mm drivers for high-performance sound, professionally tuned for big bass Silicon and Comply Foam Ear Tips for superior comfort, great fit and noise isolation Cable with integrated controls and microphone for on-the-go use Denon Club Smartphone Application, available for iPhone, iPad, or Android phones, the world's first integrated application suite designed for the younger music enthusiast